پديد آورنده :
شايان، مهرداد
عنوان :
توليد و مشخصه يابي كامپوزيت ريختگي آلومينيوم -نانو لوله كربني توسط فرآيندهاي نورد و ريخته گري كوبشي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
يازده، 145ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
بهزاد نيرومند
استاد مشاور :
محمدرضا طرقي نژاد
توصيفگر ها :
آنيل و نورد اتصالي پيوسته , طراحي آزمايش , ساختار , كيفيت قطعه , استحكام برشي , سرعت خوردگي
تاريخ نمايه سازي :
14/8/91
استاد داور :
محمود مرآتيان، احمد رضائيان
تاريخ ورود اطلاعات :
1396/09/20
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
146 Fabrication and characterization of cast Al CNT composite by rolling and squeeze casting processes Mehrdad Shayan m shayan@ma iut ac ir 12th June 2012 Department of Materials Engineering IsfahanUniversity of Technology 84156 83111 Isfahan Iran Degree M Sc Language FarsiDr Behzad Niroumand Assoc Prof Supervisor E mail behzn@cc iut ac irDr Mohammad Reza Torroghinejad Assoc Prof Advisor E mail toroghi@cc iut ac irAbstractCarbon nanotubes with their special properties are a suitable choice for reinforcing the metal matrixcomposites In this research as cast A356 CNT nanocomposites were fabricated by means ofsqueeze casting method and dilution of Al CNT composite sheets produced by continual annealingand roll bonding process into the molten matrix alloy The aim was to improve the wettability anddistribution of CNTs in the matrix The effects of carbon nanotubes and squeeze casting process onstructural mechanical and physical properties as well as the corrosion rate were investigated Furthermore mathematical relations between the inputs and outputs of the system were modeled byDesign Expert software and the optimum intervals of input parameters to obtain desired resultswere calculated Results showed that structural mechanical and physical properties of as castnanocomposites were improved by the employed process It was shown that grain size andsecondary dendrite arm spacing were reduced whereas the ultimate shear strength and shear yieldstrength at room and high temperatures were improved Reduction of density and enhancement ofporosity by addition of carbon nanotubes to the structure and enhancement of density and reductionof porosity by squeeze casting were other results of this study Squeeze cast nanocompositesretained about 85 percent of their shear strength at 300 C while the conventionally cast monolithicalloy retained only about 58 percent of its shear strength at 300 C Electrical conductivity ofcastings was decreased by incorporation of carbon nanotubes to the structure and application ofpressure during solidification Corrosion rate was decreased by incorporation of carbon nanotubesto the structure and increased by squeeze casting process The pressure carbon nanotubes contentand temperature to obtain optimum desired properties were calculated by the mathematicalrelations to be 137 56 MPa 0 5 wt and 666 75 C respectively Key Words A356 CNT nanocomposites squeeze casting method continual annealing and roll bonding process design of experiment microstructure casting quality shear strength electricalconductivity corrosion rate
استاد راهنما :
بهزاد نيرومند
استاد مشاور :
محمدرضا طرقي نژاد
استاد داور :
محمود مرآتيان، احمد رضائيان
